US7551933B2 - Telecommunications system - Google Patents

Telecommunications system Download PDF

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Publication number
US7551933B2
US7551933B2 US10/215,989 US21598902A US7551933B2 US 7551933 B2 US7551933 B2 US 7551933B2 US 21598902 A US21598902 A US 21598902A US 7551933 B2 US7551933 B2 US 7551933B2
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United States
Prior art keywords
message
cellular telephone
sms
command
write command
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related, expires
Application number
US10/215,989
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US20050026635A2 (en
US20040106416A9 (en
US20020193129A1 (en
Inventor
Wayne David Michaels
Anthony Richard Timson
Aden William Dervan
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British Technology Group Inter Corporate Licensing Ltd
RPX Corp
Original Assignee
Celltrace LLC
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US case filed in Texas Eastern District Court litigation https://portal.unifiedpatents.com/litigation/Texas%20Eastern%20District%20Court/case/6%3A09-cv-00294 Source: District Court Jurisdiction: Texas Eastern District Court "Unified Patents Litigation Data" by Unified Patents is licensed under a Creative Commons Attribution 4.0 International License.
First worldwide family litigation filed litigation https://patents.darts-ip.com/?family=27266723&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=US7551933(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from GB939312320A external-priority patent/GB9312320D0/en
Priority claimed from GB939313772A external-priority patent/GB9313772D0/en
Priority claimed from GB939314096A external-priority patent/GB9314096D0/en
Application filed by Celltrace LLC filed Critical Celltrace LLC
Priority to US10/215,989 priority Critical patent/US7551933B2/en
Publication of US20020193129A1 publication Critical patent/US20020193129A1/en
Assigned to CELLTRACE COMMUNICATIONS LIMITED reassignment CELLTRACE COMMUNICATIONS LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DERVAN, ADEN WILLIAM, MICHAELS, WAYNE DAVID, TIMSON, ANTHONY RICHARD
Assigned to INTELCOM INTERNATIONAL HOLDINGS LIMITED reassignment INTELCOM INTERNATIONAL HOLDINGS LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CELLTRACE COMMUNICATION LIMITED
Assigned to BRITISH TECHNOLOGY GROUP INTERCORPORATE LICENSING reassignment BRITISH TECHNOLOGY GROUP INTERCORPORATE LICENSING ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CELLTRACE COMMUNICATIONS LIMITED, INTELCOM INTERNATIONAL HOLDINGS, LTD, MICHAELS, WAYNE DAVID
Publication of US20040106416A9 publication Critical patent/US20040106416A9/en
Publication of US20050026635A2 publication Critical patent/US20050026635A2/en
Priority to US12/260,317 priority patent/US20090111493A1/en
Priority to US12/260,424 priority patent/US20090163236A1/en
Priority to US12/260,662 priority patent/US20090170541A1/en
Priority to US12/260,284 priority patent/US20090163233A1/en
Priority to US12/260,685 priority patent/US20090111494A1/en
Priority to US12/260,390 priority patent/US20090163235A1/en
Priority to US12/260,304 priority patent/US20090111429A1/en
Priority to US12/260,351 priority patent/US20090163234A1/en
Priority to US12/260,337 priority patent/US20090176485A1/en
Priority to US12/260,470 priority patent/US20090176519A1/en
Priority to US12/260,405 priority patent/US20090170540A1/en
Priority to US12/260,486 priority patent/US20090124274A1/en
Publication of US7551933B2 publication Critical patent/US7551933B2/en
Application granted granted Critical
Assigned to RPX CORPORATION reassignment RPX CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CELLTRACE LLC, FRISCO TX 75034
Adjusted expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W8/00Network data management
    • H04W8/18Processing of user or subscriber data, e.g. subscribed services, user preferences or user profiles; Transfer of user or subscriber data
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06QINFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q20/00Payment architectures, schemes or protocols
    • G06Q20/30Payment architectures, schemes or protocols characterised by the use of specific devices or networks
    • G06Q20/34Payment architectures, schemes or protocols characterised by the use of specific devices or networks using cards, e.g. integrated circuit [IC] cards or magnetic cards
    • G06Q20/341Active cards, i.e. cards including their own processing means, e.g. including an IC or chip
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06QINFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q20/00Payment architectures, schemes or protocols
    • G06Q20/30Payment architectures, schemes or protocols characterised by the use of specific devices or networks
    • G06Q20/34Payment architectures, schemes or protocols characterised by the use of specific devices or networks using cards, e.g. integrated circuit [IC] cards or magnetic cards
    • G06Q20/357Cards having a plurality of specified features
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06QINFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q20/00Payment architectures, schemes or protocols
    • G06Q20/30Payment architectures, schemes or protocols characterised by the use of specific devices or networks
    • G06Q20/36Payment architectures, schemes or protocols characterised by the use of specific devices or networks using electronic wallets or electronic money safes
    • G06Q20/363Payment architectures, schemes or protocols characterised by the use of specific devices or networks using electronic wallets or electronic money safes with the personal data of a user
    • GPHYSICS
    • G07CHECKING-DEVICES
    • G07FCOIN-FREED OR LIKE APPARATUS
    • G07F7/00Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus
    • G07F7/08Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus by coded identity card or credit card or other personal identification means
    • G07F7/0866Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus by coded identity card or credit card or other personal identification means by active credit-cards adapted therefor
    • GPHYSICS
    • G07CHECKING-DEVICES
    • G07FCOIN-FREED OR LIKE APPARATUS
    • G07F7/00Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus
    • G07F7/08Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus by coded identity card or credit card or other personal identification means
    • G07F7/10Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus by coded identity card or credit card or other personal identification means together with a coded signal, e.g. in the form of personal identification information, like personal identification number [PIN] or biometric data
    • G07F7/1008Active credit-cards provided with means to personalise their use, e.g. with PIN-introduction/comparison system
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00Network arrangements or protocols for supporting network services or applications
    • H04L67/01Protocols
    • H04L67/12Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
    • H04L67/125Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks involving control of end-device applications over a network
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M1/00Substation equipment, e.g. for use by subscribers
    • H04M1/26Devices for calling a subscriber
    • H04M1/27Devices whereby a plurality of signals may be stored simultaneously
    • H04M1/274Devices whereby a plurality of signals may be stored simultaneously with provision for storing more than one subscriber number at a time, e.g. using toothed disc
    • H04M1/2745Devices whereby a plurality of signals may be stored simultaneously with provision for storing more than one subscriber number at a time, e.g. using toothed disc using static electronic memories, e.g. chips
    • H04M1/275Devices whereby a plurality of signals may be stored simultaneously with provision for storing more than one subscriber number at a time, e.g. using toothed disc using static electronic memories, e.g. chips implemented by means of portable electronic directories
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M3/00Automatic or semi-automatic exchanges
    • H04M3/42Systems providing special services or facilities to subscribers
    • H04M3/487Arrangements for providing information services, e.g. recorded voice services or time announcements
    • H04M3/493Interactive information services, e.g. directory enquiries ; Arrangements therefor, e.g. interactive voice response [IVR] systems or voice portals
    • H04M3/4931Directory assistance systems
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M1/00Substation equipment, e.g. for use by subscribers
    • H04M1/26Devices for calling a subscriber
    • H04M1/27Devices whereby a plurality of signals may be stored simultaneously
    • H04M1/274Devices whereby a plurality of signals may be stored simultaneously with provision for storing more than one subscriber number at a time, e.g. using toothed disc
    • H04M1/2745Devices whereby a plurality of signals may be stored simultaneously with provision for storing more than one subscriber number at a time, e.g. using toothed disc using static electronic memories, e.g. chips
    • H04M1/2753Devices whereby a plurality of signals may be stored simultaneously with provision for storing more than one subscriber number at a time, e.g. using toothed disc using static electronic memories, e.g. chips providing data content
    • H04M1/2757Devices whereby a plurality of signals may be stored simultaneously with provision for storing more than one subscriber number at a time, e.g. using toothed disc using static electronic memories, e.g. chips providing data content by data transmission, e.g. downloading
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M1/00Substation equipment, e.g. for use by subscribers
    • H04M1/72Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
    • H04M1/724User interfaces specially adapted for cordless or mobile telephones
    • H04M1/72403User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality
    • H04M1/7243User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality with interactive means for internal management of messages
    • H04M1/72436User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality with interactive means for internal management of messages for text messaging, e.g. SMS or e-mail
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M2250/00Details of telephonic subscriber devices
    • H04M2250/14Details of telephonic subscriber devices including a card reading device
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/12Messaging; Mailboxes; Announcements
    • H04W4/14Short messaging services, e.g. short message services [SMS] or unstructured supplementary service data [USSD]

Definitions

  • This invention relates to a telecommunications system.
  • a mobile communications system such as a cellular mobile radio or telephone system.
  • SIM cards Subscriber Identity Modules
  • SIM cards are integrated circuit cards which can be releasably inserted into a mobile telephone and which contain in memory the subscriber's identity, i.e., his telephone number.
  • SIM cards also have a rolling buffer which can store a certain number of alphanumeric characters.
  • the buffer facilitates the so-called Short Message Service (SMS) in which a message for a subscriber or for a specified group of subscribers can be broadcast over the air, as an advanced form of radiopaging. Messages can be received by a mobile telephone whenever it is idle or on stand-by. However, if a message is received which would overfill the buffer, data is lost on a first-in-first-out basis.
  • SMS Short Message Service
  • the present invention consists in a telecommunications system comprising at least one host station and a plurality of subscriber units, the or each host station being operable to transmit a message to at least one of the subscriber units, and each subscriber unit having a multiplicity of fixed memory locations and means responsive to the detection of the message to store the message in a selected one of the fixed memory locations which can not be overwritten from the subscriber unit, but which can be accessed from the subscriber unit when required.
  • a “fixed” memory location means a location into which data can be written, and excludes first-in-first-out or circular buffers. Overwriting of all the data in certain “fixed” memory locations may occur in contrast to the first-in-first-out loss of data experienced with current SMS buffers.
  • a set of telephone numbers can be transmitted to the SIM card, allowing users easy access to commonly used services such as hotels, car hire or airline reservations.
  • This feature is known as a Value Added Service Directory.
  • a message may be retrievable by the subscriber on the entry of simple, short codes into the subscriber unit, each memory location corresponding to a particular code.
  • a message may include a telephone number and, once stored, may be able to be overwritten over the air.
  • the or each host station is operable to transmit a request for information stored in a subscriber unit.
  • the information may be included in a message and it may also include information which is stored in a secure memory location, accessible only when the subscriber enters a personal identification number (PIN number).
  • PIN number personal identification number
  • the information may include credit details relevant to the subscriber, for example, a credit card number of credit status, thus greatly facilitating credit card transactions carried out over the telephone. Using this feature of the invention, a credit account holder avoids having to dictate his account details and need only enter the mandatory PIN number.
  • the host station may be operable to transmit instructions to lock and/or unlock a memory location at the subscriber unit. It may be operable to transmit instructions to run a program stored in memory locations at the subscriber unit.
  • the host station may be operable to transmit files containing functional data and/or files containing non-functional data to the subscriber unit.
  • the messages, requests for information and the instructions being transmitted may be in a specific format which the subscriber unit is able to distinguish from other formats. The specific format may be made secure against interception.
  • the subscriber unit comprises a mobile radio or telephone and an integrated circuit card which can be removably connected to the radio/telephone.
  • the integrated circuit card may contain the memory locations and may contain means for distinguishing the specific format from other formats.
  • the card may contain means for distinguishing between the messages, requests for information and instructions.
  • the card may also contain the means for storing the messages and means for acting on the requests and instructions.
  • the invention consists in a module for controlling a subscriber unit in a telecommunications system, comprising a multiplicity of fixed memory locations and means responsive to the detection of a message transmitted remotely thereto to store the message in a selected one of the fixed memory locations, and being adapted for removable connection to a transceiver of the subscriber unit.
  • At least one of the fixed memory locations may be protected from overwriting by the subscriber.
  • the module or card may include means for rendering any or all of said fixed memory locations accessible or inaccessible by either the subscriber or the host station.
  • the card may include a directory structure within which files can be stored.
  • the invention is particularly applicable to global telecommunication systems in which the mobile cellular telephone networks of various countries or areas communicate using a common standard.
  • GSM Global System for Mobile Communications
  • the invention is not limited to global systems and could be applied to a single national cellular network or even to a fixed land-linked network.
  • FIG. 1 shows the transmission of messages to a subscriber unit in a system according to the invention
  • FIG. 2 shows a process in which a subscriber unit transmits a message and requested information
  • FIG. 3 is a block diagram showing elements of a module shown in FIGS. 1 and 2 ;
  • FIG. 4 shows details of one of the blocks shown in FIG. 3 ;
  • FIG. 5 is a flowchart showing the operation of the module shown in FIGS. 1 to 4 .
  • FIG. 1 illustrates an SMS distribution path according to the invention.
  • the short messages have usually been directed to a single subscriber or a specified group of subscribers such as a sales team.
  • GSM also supports a feature known as Cell Broadcast in which messages can be sent to all the subscribers in a particular area.
  • a message consists of the telephone number of an advertiser and an alphanumeric tag to identify the advertiser.
  • An operator enters the message into a terminal 1 .
  • the message is then coded into a secure format known to applicants as an Embedded Command Stream (ECS) and sent via a modem 2 and a fixed line 3 to a local GSM switch 4 .
  • ECS Embedded Command Stream
  • the message is delivered to any or all of the other switches within that network, or even across networks.
  • the switch 4 which in this example is in the geographical area to which the message is to be transmitted, delivers the message to a number of cellsites 5 .
  • the cellsites 5 are the base transceiver stations of the GSM network.
  • Each cellsite 5 then broadcasts the message to a group of transceivers or mobile telephones, hereinafter referred to as “mobiles”. If Cell Broadcast is used, the group consists of all mobiles within the geographical area at the time of the broadcast.
  • a selected mobile 6 receiving the message transmits a confirmation of receipt back to its respective cellsite 5 . From now on, until an update situation, the system will not contact this mobile 6 again.
  • the mobile 6 recognizes the message as SMS data and passes it to a SIM card 7 , which is a small self-contained microprocessor, held in a slot in the mobile 6 .
  • the SIM card 7 in turn recognizes the ECS using special hardware and software and stores the message in memory in such a way that it may not be overwritten by the subscriber.
  • Known SIM cards contain a large number of fixed memory locations in which the subscriber can store frequently dialed numbers and corresponding alphanumeric tags.
  • the SIM card 7 of the invention stores the message in one of these locations, and then carries out a write protect operation.
  • the locations dedicated to storing write protected messages may be designated by code numbers relating to a particular category of advertiser. Thus, for example, car hire company telephone numbers can be stored in location 01 , hotel reservations in location 02 and so on.
  • FIG. 2 shows a call placing process in which a subscriber communicates with an advertiser.
  • the subscriber remembering that the car hire company's number is in location 01 as shown at 8 , keys in a short code corresponding to the location, such as 01 #.
  • the mobile 6 then interrogates the SIM card 7 to retrieve the telephone number from the location.
  • the SIM card 7 provides both the number and the alphanumeric tag giving the company's name and displays it to the subscriber. The user confirms that he wishes to proceed by pressing SEND.
  • the mobile obtains a voice channel through which the call proceeds to the dialed number.
  • the GSM system automatically handles intra-network and inter-network hops. At this point the subscriber can hold a voice conversation with the company.
  • subscriber identity information read from the SIM card 7 gives the company immediate customer billing details such as a name and address.
  • the SIM card 7 also contains information detailing the subscriber's credit account. This information is held in a separate, secure memory location, accessible only when the subscriber enters a mandatory PIN number, known only to himself, thus confirming that the mobile has not been stolen or lost. When the subscriber has confirmed his car hire deal, he enters the PIN number into the mobile 6 , requesting the credit information from the SIM card 7 .
  • the SIM card 7 supplies the information and the mobile uses existing voice/data techniques to transmit the information to the company, in a format secure against detection by fraudsters. The sale is confirmed by the company or its equipment and the call is terminated.
  • the subscriber calls network directory enquiries and gives the name of the person, company or service of which he wishes to ascertain the telephone number, as well as any additional information requested by the operator answering the call.
  • the operator locates the number, confirms it and enquires as to whether the number is to be transmitted verbally, transferred over SMS into a given memory location of the subscriber's SIM card or both.
  • the voice call is terminated and the operator initiates the SMS process by entering a sequence into a computer or pressing a dedicated button.
  • the telephone number is then encoded into an ECS message at the despatch center and is posted across the network to the subscriber's communications terminal, which transmits a confirmation to the despatch center.
  • the retry mechanism which operates until such a confirmation is received, is suspended.
  • the communications terminal recognizes the message as SMS data, passes it to the SIM card, and if capable, displays a “message received” banner.
  • the SIM card in turn recognizes the ECS using special hardware and software, and decodes it accordingly.
  • the number, and any associated alphanumeric tag which would normally consist of the name of the person or company, are recovered together with the memory location in which they are intended to be stored. The number and name-tag are then written to that location and are write-protected if requested by the subscriber, the overwrite protection being encoded into the message at source.
  • the subscriber attempts to place a call to the number in the known memory location by keying in the memory location number.
  • the SIM card passes the telephone or fax number to the communications terminal on demand, and upon receipt of the subscriber's confirmation, the communications terminal sets up the call to the desired number.
  • FIG. 3 shows the electronic structure of the SIM card 7 .
  • I/O input/output
  • a filter 16 receives incoming data from the I/O manager and detects any ECS messages from among the short messages received.
  • the ECS messages are sent directly to an extended erasable read only memory (E 2 ROM) 17 , which is preferably a “flash” E 2 ROM. Data can also be output from the E 2 ROM directly to the I/O manager 15 .
  • E 2 ROM extended erasable read only memory
  • FIG. 4 shows how the E 2 ROM is organized.
  • a root directory 18 contains a SIM administration and identifier 19 , a GSM directory and network data 20 , and a telecom directory 21 .
  • the telecom directory in turn contains memory locations as follows: “abbreviated dial numbers” 22 , “capability configuration” 23 , “short messages” 24 , “fixed dial numbers” 25 , and “charging counter” 26 .
  • Each block represents a plurality of memory locations.
  • the frequently dialed numbers and corresponding alphanumeric tags are stored at locations 22 .
  • the “abbreviated dial numbers” locations 22 and the “short messages” locations 24 each have an associated locking control file 27 , 28 , respectively.
  • the locking control files constitute means for read/write protecting and removing read/write protection from their associated memory locations.
  • the locking control files 27 , 28 will typically be in the telecom directory 21 as shown, however they can be located elsewhere such as in an administration directory.
  • FIG. 5 is a flowchart illustrating the operation of the SIM card 7 , which uses the specially fabricated hardware and software which has been described above to implement the operations illustrated.
  • messages, requests, and instructions having ECS are distinguished from those without.
  • Each of these ECS types consists of a data stream headed by a command which is one of at least four types: write commands for the messages, read commands for the requests for information, attribute commands for lock or unlock instructions and run commands for instructions to run a program.
  • the command and data types are decoded at box 10 and acted on in one of the four paths 11 - 14 .
  • Path 11 handles the write commands to store messages starting at a location specified therein.
  • Path 12 handles the read commands; again, the requests for information contain a location to be accessed first. Successive locations are read and the data stored in a buffer until the required amount of data has been read. The data in the buffer is then encoded into the ECS format and despatched from the mobile using SMS to the calling party.
  • attribute commands are used to lock or unlock specified memory locations and render them accessible or inaccessible, either to calling parties or to the subscriber.
  • run commands cause a program stored in the SIM card to be run.
  • the basic ECS system is expandable to up to 255 internal shell commands of which write, read, lock/unlock and run are four examples.
  • the internal shell commands are a supplement to the ability of the system to create external file objects within the SIM card 7 .
  • the file objects are of two types: Application Data File Programs (ADFP's) containing functional data which can be executed by the SIM card processor and can self modify if required and Application Data Files (ADF's) containing non-functional data which does not have these capabilities.
  • ADFP's Application Data File Programs
  • ADF's Application Data Files
  • Existing ADF(P)'S can be modified over-the-air enabling advanced facilities such as personalization, re-personalization or downloadable phone book.
  • the SIM card 7 has a directory structure, similar to that of a computer disk, and new ADF(P)'S can be downloaded into any directory over the air. Also over the air, directories can be created, deleted and modified, multiple tree directory operations can be carried out and ADF(P)'S that are no longer required can be deleted. The amount of ADF(P) data which can be downloaded is limited only by the size of the E 2 ROM memory of the card.
  • the invention greatly extends the applications of SIM cards. For example, using the Value Added Services Directory, subscribers can book hotels and airline seats over their mobiles quickly and easily.
  • An additional advantage of this feature of the invention is that the geographical distribution of messages to cards in a specific area such as the South of France is facilitated. Thus advertisers can direct their messages to all mobile subscribers in the specific area. This, is particularly useful when subscribers “roam” from one area to another and have no knowledge of local services.
  • the directory enquiries download enables contact telephone or fax numbers to be delivered to a subscriber's communications terminal without any intervention by the subscriber.
  • the process of manually entering a number whilst engaged in a call to the operator is often dangerous, especially when the subscriber is driving.
  • ADF(P)'S means that additional services can be added to the SIM card over the air while maintaining total compatibility with the existing cellular system.
  • the SIM card could acquire the functions of a credit card, passport, driving license, car park pass, membership card and so on, becoming a multi-service card.
  • dynamically updatable services can be added which require a different process to be run each time a service is accessed.
  • the card Once the card has extra services on it, it can be used outside of the mobile phone environment if desired as a standalone item. This can be read from or written to by a dedicated piece of hardware, such as a point of sale machine. If desired, the new services can be deleted, however the card will never lose its mobile phone SIM capability. In addition, if the card has extra services, they will continue to function even if the subscriber has been disconnected from the mobile phone network, unless otherwise desired.
  • the SIM card can be trained only to receive messages detailing services relevant to the subscriber's needs.

Abstract

In a telecommunications system such as a global mobile telephone network in which each subscriber unit includes a Subscriber Identity Module (SIM card), each SIM card has fixed memory locations, to which data can be addressed over the air. Some of the locations can not be overwritten from the subscriber unit but can be accessed therefrom on the entry of short simple codes, each associated with one of the locations. Further fixed memory locations can be read over the air only when the subscriber enters a personal identification number. Locking control files are used to control read/write access to the locations respectively.

Description

CROSS REFERENCE TO RELATED APPLICATIONS
This application claims priority under 35 USC § 120 and is a continuation of U.S. application Ser. No. 09/455,628, filed Dec. 7, 1999, now U.S. Pat. No. 6,453,167, which is a Continuation of U.S. application Ser. No. 08/557,147, filed Apr. 19, 1996, now U.S. Pat. No. 6,011,976, which is a national application of prior International Application No. PCT/GB94/01295, filed Jun. 15, 1994. U.S. application Ser. Nos. 09/455,628 and 08/557,147 are incorporated herein by reference.
BACKGROUND OF THE INVENTION
This invention relates to a telecommunications system. In particular, but not exclusively, it relates to a mobile communications system such as a cellular mobile radio or telephone system.
A recent innovation in such systems has been the introduction of Subscriber Identity Modules (SIM cards). These are integrated circuit cards which can be releasably inserted into a mobile telephone and which contain in memory the subscriber's identity, i.e., his telephone number. These known SIM cards also have a rolling buffer which can store a certain number of alphanumeric characters. The buffer facilitates the so-called Short Message Service (SMS) in which a message for a subscriber or for a specified group of subscribers can be broadcast over the air, as an advanced form of radiopaging. Messages can be received by a mobile telephone whenever it is idle or on stand-by. However, if a message is received which would overfill the buffer, data is lost on a first-in-first-out basis.
It is an object of the invention to provide a more efficient and remotely reconfigurable SIM card.
SUMMARY OF THE INVENTION
From one aspect, the present invention consists in a telecommunications system comprising at least one host station and a plurality of subscriber units, the or each host station being operable to transmit a message to at least one of the subscriber units, and each subscriber unit having a multiplicity of fixed memory locations and means responsive to the detection of the message to store the message in a selected one of the fixed memory locations which can not be overwritten from the subscriber unit, but which can be accessed from the subscriber unit when required.
In the present application, a “fixed” memory location means a location into which data can be written, and excludes first-in-first-out or circular buffers. Overwriting of all the data in certain “fixed” memory locations may occur in contrast to the first-in-first-out loss of data experienced with current SMS buffers.
Thus, for example, a set of telephone numbers, each with an identifying alphanumeric tag, can be transmitted to the SIM card, allowing users easy access to commonly used services such as hotels, car hire or airline reservations. This feature is known as a Value Added Service Directory.
A message may be retrievable by the subscriber on the entry of simple, short codes into the subscriber unit, each memory location corresponding to a particular code. A message may include a telephone number and, once stored, may be able to be overwritten over the air. Preferably, the or each host station is operable to transmit a request for information stored in a subscriber unit. The information may be included in a message and it may also include information which is stored in a secure memory location, accessible only when the subscriber enters a personal identification number (PIN number). The information may include credit details relevant to the subscriber, for example, a credit card number of credit status, thus greatly facilitating credit card transactions carried out over the telephone. Using this feature of the invention, a credit account holder avoids having to dictate his account details and need only enter the mandatory PIN number.
The host station may be operable to transmit instructions to lock and/or unlock a memory location at the subscriber unit. It may be operable to transmit instructions to run a program stored in memory locations at the subscriber unit. The host station may be operable to transmit files containing functional data and/or files containing non-functional data to the subscriber unit. The messages, requests for information and the instructions being transmitted may be in a specific format which the subscriber unit is able to distinguish from other formats. The specific format may be made secure against interception.
In a preferred embodiment, the subscriber unit comprises a mobile radio or telephone and an integrated circuit card which can be removably connected to the radio/telephone. The integrated circuit card may contain the memory locations and may contain means for distinguishing the specific format from other formats. The card may contain means for distinguishing between the messages, requests for information and instructions. The card may also contain the means for storing the messages and means for acting on the requests and instructions.
From another aspect, the invention consists in a module for controlling a subscriber unit in a telecommunications system, comprising a multiplicity of fixed memory locations and means responsive to the detection of a message transmitted remotely thereto to store the message in a selected one of the fixed memory locations, and being adapted for removable connection to a transceiver of the subscriber unit.
At least one of the fixed memory locations may be protected from overwriting by the subscriber. The module or card may include means for rendering any or all of said fixed memory locations accessible or inaccessible by either the subscriber or the host station. The card may include a directory structure within which files can be stored.
The invention is particularly applicable to global telecommunication systems in which the mobile cellular telephone networks of various countries or areas communicate using a common standard. An example of such a global system is GSM (Global System for Mobile Communications) currently operating in Europe. However the invention is not limited to global systems and could be applied to a single national cellular network or even to a fixed land-linked network.
BRIEF DESCRIPTION OF THE DRAWINGS
An embodiment of the invention will now be described by way of example with reference to the accompanying drawings in which:
FIG. 1 shows the transmission of messages to a subscriber unit in a system according to the invention;
FIG. 2 shows a process in which a subscriber unit transmits a message and requested information;
FIG. 3 is a block diagram showing elements of a module shown in FIGS. 1 and 2;
FIG. 4 shows details of one of the blocks shown in FIG. 3; and
FIG. 5 is a flowchart showing the operation of the module shown in FIGS. 1 to 4.
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 illustrates an SMS distribution path according to the invention. In the prior art, the short messages have usually been directed to a single subscriber or a specified group of subscribers such as a sales team.
However, GSM also supports a feature known as Cell Broadcast in which messages can be sent to all the subscribers in a particular area. In the embodiment of the invention illustrated, a message consists of the telephone number of an advertiser and an alphanumeric tag to identify the advertiser.
An operator enters the message into a terminal 1. The message is then coded into a secure format known to applicants as an Embedded Command Stream (ECS) and sent via a modem 2 and a fixed line 3 to a local GSM switch 4. According to its delivery address, the message is delivered to any or all of the other switches within that network, or even across networks.
The switch 4, which in this example is in the geographical area to which the message is to be transmitted, delivers the message to a number of cellsites 5. The cellsites 5 are the base transceiver stations of the GSM network.
Each cellsite 5 then broadcasts the message to a group of transceivers or mobile telephones, hereinafter referred to as “mobiles”. If Cell Broadcast is used, the group consists of all mobiles within the geographical area at the time of the broadcast.
A selected mobile 6 receiving the message transmits a confirmation of receipt back to its respective cellsite 5. From now on, until an update situation, the system will not contact this mobile 6 again.
The mobile 6 recognizes the message as SMS data and passes it to a SIM card 7, which is a small self-contained microprocessor, held in a slot in the mobile 6. The SIM card 7 in turn recognizes the ECS using special hardware and software and stores the message in memory in such a way that it may not be overwritten by the subscriber. Known SIM cards contain a large number of fixed memory locations in which the subscriber can store frequently dialed numbers and corresponding alphanumeric tags. The SIM card 7 of the invention stores the message in one of these locations, and then carries out a write protect operation. The locations dedicated to storing write protected messages may be designated by code numbers relating to a particular category of advertiser. Thus, for example, car hire company telephone numbers can be stored in location 01, hotel reservations in location 02 and so on.
FIG. 2 shows a call placing process in which a subscriber communicates with an advertiser. The subscriber, remembering that the car hire company's number is in location 01 as shown at 8, keys in a short code corresponding to the location, such as 01#. The mobile 6 then interrogates the SIM card 7 to retrieve the telephone number from the location. The SIM card 7 provides both the number and the alphanumeric tag giving the company's name and displays it to the subscriber. The user confirms that he wishes to proceed by pressing SEND.
Next, the mobile obtains a voice channel through which the call proceeds to the dialed number. The GSM system automatically handles intra-network and inter-network hops. At this point the subscriber can hold a voice conversation with the company.
Providing the correct equipment has been installed at the company, as soon as the call is answered, subscriber identity information read from the SIM card 7 gives the company immediate customer billing details such as a name and address.
The SIM card 7 also contains information detailing the subscriber's credit account. This information is held in a separate, secure memory location, accessible only when the subscriber enters a mandatory PIN number, known only to himself, thus confirming that the mobile has not been stolen or lost. When the subscriber has confirmed his car hire deal, he enters the PIN number into the mobile 6, requesting the credit information from the SIM card 7. The SIM card 7 supplies the information and the mobile uses existing voice/data techniques to transmit the information to the company, in a format secure against detection by fraudsters. The sale is confirmed by the company or its equipment and the call is terminated.
In this example, it is also possible to obtain a telephone or fax number from the operator-assisted directory enquiries system without the subscriber having to manually enter the number into the communications terminal which he desires to use.
To use this feature, the subscriber calls network directory enquiries and gives the name of the person, company or service of which he wishes to ascertain the telephone number, as well as any additional information requested by the operator answering the call. The operator then locates the number, confirms it and enquires as to whether the number is to be transmitted verbally, transferred over SMS into a given memory location of the subscriber's SIM card or both.
If the subscriber chooses a SIM update, the voice call is terminated and the operator initiates the SMS process by entering a sequence into a computer or pressing a dedicated button. The telephone number is then encoded into an ECS message at the despatch center and is posted across the network to the subscriber's communications terminal, which transmits a confirmation to the despatch center. Thus, the retry mechanism, which operates until such a confirmation is received, is suspended.
The communications terminal recognizes the message as SMS data, passes it to the SIM card, and if capable, displays a “message received” banner. The SIM card in turn recognizes the ECS using special hardware and software, and decodes it accordingly. The number, and any associated alphanumeric tag, which would normally consist of the name of the person or company, are recovered together with the memory location in which they are intended to be stored. The number and name-tag are then written to that location and are write-protected if requested by the subscriber, the overwrite protection being encoded into the message at source.
Subsequently, the subscriber attempts to place a call to the number in the known memory location by keying in the memory location number. The SIM card passes the telephone or fax number to the communications terminal on demand, and upon receipt of the subscriber's confirmation, the communications terminal sets up the call to the desired number.
FIG. 3 shows the electronic structure of the SIM card 7. The card communicates with the mobile to which it is connected via an input/output (I/O) manager 15, preferably using the protocol ISO 7816 T=0. A filter 16 receives incoming data from the I/O manager and detects any ECS messages from among the short messages received. The ECS messages are sent directly to an extended erasable read only memory (E2ROM) 17, which is preferably a “flash” E2ROM. Data can also be output from the E2ROM directly to the I/O manager 15. The remaining blocks shown in FIG. 3 are standard components of a SIM card.
FIG. 4 shows how the E2ROM is organized. A root directory 18 contains a SIM administration and identifier 19, a GSM directory and network data 20, and a telecom directory 21.
The telecom directory in turn contains memory locations as follows: “abbreviated dial numbers” 22, “capability configuration” 23, “short messages” 24, “fixed dial numbers” 25, and “charging counter” 26. Each block represents a plurality of memory locations. The frequently dialed numbers and corresponding alphanumeric tags are stored at locations 22.
The “abbreviated dial numbers” locations 22 and the “short messages” locations 24 each have an associated locking control file 27, 28, respectively. The locking control files constitute means for read/write protecting and removing read/write protection from their associated memory locations. The locking control files 27, 28 will typically be in the telecom directory 21 as shown, however they can be located elsewhere such as in an administration directory.
FIG. 5 is a flowchart illustrating the operation of the SIM card 7, which uses the specially fabricated hardware and software which has been described above to implement the operations illustrated. At lozenge 9, messages, requests, and instructions having ECS are distinguished from those without. Each of these ECS types consists of a data stream headed by a command which is one of at least four types: write commands for the messages, read commands for the requests for information, attribute commands for lock or unlock instructions and run commands for instructions to run a program.
The command and data types are decoded at box 10 and acted on in one of the four paths 11-14.
Path 11 handles the write commands to store messages starting at a location specified therein. Path 12 handles the read commands; again, the requests for information contain a location to be accessed first. Successive locations are read and the data stored in a buffer until the required amount of data has been read. The data in the buffer is then encoded into the ECS format and despatched from the mobile using SMS to the calling party.
In path 13, attribute commands are used to lock or unlock specified memory locations and render them accessible or inaccessible, either to calling parties or to the subscriber. In path 14, run commands cause a program stored in the SIM card to be run.
The basic ECS system is expandable to up to 255 internal shell commands of which write, read, lock/unlock and run are four examples. The specific protocol used for the transfer of information is not fixed and could be ISO7816 T=0 or any other suitable protocol.
The internal shell commands are a supplement to the ability of the system to create external file objects within the SIM card 7. The file objects are of two types: Application Data File Programs (ADFP's) containing functional data which can be executed by the SIM card processor and can self modify if required and Application Data Files (ADF's) containing non-functional data which does not have these capabilities. Existing ADF(P)'S can be modified over-the-air enabling advanced facilities such as personalization, re-personalization or downloadable phone book.
The SIM card 7 has a directory structure, similar to that of a computer disk, and new ADF(P)'S can be downloaded into any directory over the air. Also over the air, directories can be created, deleted and modified, multiple tree directory operations can be carried out and ADF(P)'S that are no longer required can be deleted. The amount of ADF(P) data which can be downloaded is limited only by the size of the E2ROM memory of the card.
The invention, as described, greatly extends the applications of SIM cards. For example, using the Value Added Services Directory, subscribers can book hotels and airline seats over their mobiles quickly and easily.
An additional advantage of this feature of the invention is that the geographical distribution of messages to cards in a specific area such as the South of France is facilitated. Thus advertisers can direct their messages to all mobile subscribers in the specific area. This, is particularly useful when subscribers “roam” from one area to another and have no knowledge of local services.
The directory enquiries download enables contact telephone or fax numbers to be delivered to a subscriber's communications terminal without any intervention by the subscriber. The process of manually entering a number whilst engaged in a call to the operator is often dangerous, especially when the subscriber is driving.
The ability of the system to download ADF(P)'S means that additional services can be added to the SIM card over the air while maintaining total compatibility with the existing cellular system. Thus the SIM card could acquire the functions of a credit card, passport, driving license, car park pass, membership card and so on, becoming a multi-service card. Also, dynamically updatable services can be added which require a different process to be run each time a service is accessed.
Once the card has extra services on it, it can be used outside of the mobile phone environment if desired as a standalone item. This can be read from or written to by a dedicated piece of hardware, such as a point of sale machine. If desired, the new services can be deleted, however the card will never lose its mobile phone SIM capability. In addition, if the card has extra services, they will continue to function even if the subscriber has been disconnected from the mobile phone network, unless otherwise desired.
Modifications are possible without departing from the scope of the invention. For example, the SIM card can be trained only to receive messages detailing services relevant to the subscriber's needs.

Claims (20)

1. A method of communicating between a remote station and a GSM-compatible cellular telephone capable of two-way voice communication, comprising:
selectively transmitting from the remote station to the cellular telephone an SMS text message containing text;
selectively transmitting from the remote station to the cellular telephone an SMS write command message containing a write command and associated write data, the cellular telephone including a removably coupled SIM card;
the cellular telephone detecting an incoming communication as an incoming SMS write command message or an incoming SMS text message; and
in the event the incoming communication is an SMS text message, displaying at least a portion of the text contained in the incoming SMS text message on a display associated with the cellular telephone; and
in the event the incoming communication is an SMS write command message, the SIM card decoding the write command contained in the SMS write command message.
2. The method of claim 1, wherein the SMS write command message comprises a command embedded in the incoming communication.
3. The method of claim 2, wherein the cellular telephone distinguishes an SMS message from other message types, and passes the SMS message to the SIM card, which decodes the embedded command if the SMS message comprises the SMS write command.
4. The method of claim 1, wherein the incoming communication includes a telephone number requested by a user of the GSM-compatible cellular telephone from a directory assistance service.
5. The method of claim 1, wherein the write command is automatically executed by a processor in the SIM card to cause the associated write data to be written into a memory of the GSM-compatible cellular telephone, without requiring user intervention.
6. The method of claim 1, further comprising selectively transmitting an SMS read command message which includes a read command.
7. The method of claim 1, further comprising selectively transmitting an SMS run command message which includes a run command.
8. The method of claim 1, further comprising selectively transmitting an SMS attribute command message which includes an attribute command which has the effect of locking an indicated portion of the memory is to prevent the indicated portion of a memory of the GSM-compatible cellular telephone from being overwritten by a user of the GSM-compatible cellular telephone.
9. A GSM-compatible telecommunications network for communicating with a plurality of cellular telephones, comprising:
at least one cellular telephone containing a removably coupled SIM card; and
at least one host station which selectively transmits an SMS text message containing text, or an SMS write command message containing a write command and associated write data, to the at least one cellular telephone;
wherein the at least one cellular telephone detects an incoming communication as an incoming SMS write command message or as an incoming SMS text message;
and wherein, in the event the incoming communication is an incoming SMS text message, a display associated with the at least one cellular telephone displays at least a portion of the text contained in the incoming SMS text message;
and wherein, in the event the incoming communication is an incoming SMS write command message, the SIM card decodes the write command contained in the incoming SMS write command message.
10. The network of claim 9, wherein the GSM-compatible cellular telephone includes a memory having first and second sets of memory locations, and wherein in the event the incoming communication is an SMS text message, storing at least a portion of the text contained in the SMS text message in the first set of memory locations, and in the event the incoming communication is an SMS command message, storing at least a portion of the associated write data in the second set of memory locations.
11. The network of claim 9, wherein the GSM-compatible cellular telephone includes a memory having first and second sets of memory locations, and wherein the first set of memory locations are prevented from being overwritten from the cellular telephone, and the second set of memory locations are not prevented from being overwritten from the cellular telephone.
12. The network of claim 9, wherein:
the detecting is performed by a first processor contained in a main body of the GSM-compatible cellular telephone;
in the event the incoming communication is an SMS write command message, the first processor passing the SMS write command message and the associated write data to the SIM card; and
a second processor contained in the SIM card executing the write command.
13. The network of claim 9, wherein the associated write data is prevented from being overwritten by a user of the GSM-compatible cellular telephone.
14. The network of claim 9, wherein the associated write data includes information relevant to a specific geographical area of a user of the GSM-compatible cellular telephone.
15. The network of claim 9, wherein the associated write data includes application program data files.
16. The network of claim 9, wherein the at least one host station selectively transmits to the cellular telephone the SMS write command message containing a write command and associated write data without requiring user interaction.
17. A telecommunications network for communicating with a plurality of cellular telephones, comprising:
a cellular telephone capable of two-way voice communication; and
at least one remote station which selectively transmits to the cellular telephone a message of a first message type or a second message type, wherein the first message type is formatted to contain text to be displayed on a display of the cellular telephone and the second message type is formatted to contain a command and data associated with the command, wherein the command indicates to the cellular telephone to execute at least one instruction for performing an operation other than to support the displaying of text;
wherein the cellular telephone distinguishes the message as being of either the first message type or the second message type,
and, if the message is of the first message type, displaying at least a portion of the text on the display of the cellular telephone,
and automatically, if the message is of the second message type, executing the at least one instruction;
wherein the message is wirelessly carried from the remote station to the cellular telephone using a common short message service protocol over a common short message service channel, regardless of whether the message is of the first or the second message type;
wherein the remote station is configured to transmit messages of the first and the second message types, and the cellular telephone is configured to receive and process messages of the first and the second message types; and
wherein remotely located information is downloaded to the cellular telephone.
18. The network of claim 17, wherein the command is a run command that causes a prestored set of instructions, including the at least one instruction, to be executed.
19. The network of claim 17, wherein the operation is performed without requiring any intervention by a user of the cellular telephone.
20. The network of claim 17, wherein the short message service protocol is an SMS protocol compliant with a GSM cellular telephony standard, and the short message service channel is compliant with a GSM cellular telephony standard.
US10/215,989 1993-06-15 2002-08-09 Telecommunications system Expired - Fee Related US7551933B2 (en)

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US10/215,989 US7551933B2 (en) 1993-06-15 2002-08-09 Telecommunications system
US12/260,685 US20090111494A1 (en) 1993-06-15 2008-10-29 Telecommunications System
US12/260,337 US20090176485A1 (en) 1993-06-15 2008-10-29 Telecommunications System
US12/260,486 US20090124274A1 (en) 1993-06-15 2008-10-29 Telecommunications system
US12/260,405 US20090170540A1 (en) 1993-06-15 2008-10-29 Telecommunications System
US12/260,317 US20090111493A1 (en) 1993-06-15 2008-10-29 Telecommunications system
US12/260,424 US20090163236A1 (en) 1993-06-15 2008-10-29 Telecommunications system
US12/260,351 US20090163234A1 (en) 1993-06-15 2008-10-29 Telecommunications system
US12/260,304 US20090111429A1 (en) 1993-06-15 2008-10-29 Telecommunications system
US12/260,390 US20090163235A1 (en) 1993-06-15 2008-10-29 Telecommunications System
US12/260,284 US20090163233A1 (en) 1993-06-15 2008-10-29 Telecommunications system
US12/260,662 US20090170541A1 (en) 1993-06-15 2008-10-29 Telecommunications System
US12/260,470 US20090176519A1 (en) 1993-06-15 2008-10-29 Telecommunications System

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GB9312320.6 1993-06-15
GBGB93/12320 1993-06-15
GB939312320A GB9312320D0 (en) 1993-06-15 1993-06-15 E.c.s.
GB939313772A GB9313772D0 (en) 1993-07-02 1993-07-02 Telecommunications system
GB9313772.7 1993-07-02
GBGB93/13772 1993-07-02
GB9314096.0 1993-07-08
GB939314096A GB9314096D0 (en) 1993-06-15 1993-07-08 Ecs
GBGB93/14096 1993-07-08
US08/557,147 US6011976A (en) 1993-06-15 1994-06-15 Telecommunications system with value added service directory and an integrated circuit module therefor
GBPCT/GB94/01295 1994-06-15
PCT/GB1994/001295 WO1994030023A1 (en) 1993-06-15 1994-06-15 Telecommunications system
US09/455,628 US6453167B1 (en) 1993-06-15 1999-12-07 Telecommunications systems
US10/215,989 US7551933B2 (en) 1993-06-15 2002-08-09 Telecommunications system

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US12/260,486 Continuation US20090124274A1 (en) 1993-06-15 2008-10-29 Telecommunications system

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US20020193129A1 US20020193129A1 (en) 2002-12-19
US20040106416A9 US20040106416A9 (en) 2004-06-03
US20050026635A2 US20050026635A2 (en) 2005-02-03
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US08/557,147 Expired - Lifetime US6011976A (en) 1993-06-15 1994-06-15 Telecommunications system with value added service directory and an integrated circuit module therefor
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US10/215,989 Expired - Fee Related US7551933B2 (en) 1993-06-15 2002-08-09 Telecommunications system
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US20090170540A1 (en) * 1993-06-15 2009-07-02 Wayne David Michaels Telecommunications System
US20090170541A1 (en) * 1993-06-15 2009-07-02 Wayne David Michaels Telecommunications System
US20090176519A1 (en) * 1993-06-15 2009-07-09 Wayne David Michaels Telecommunications System
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